author: Xi Wang <xi.wang@gmail.com> 2012-04-25 14:45:22 -0400
committer: David Woodhouse <David.Woodhouse@intel.com> 2012-05-13 23:05:15 -0500
commit: 7c80c352331a27cf0584f1701ed3a003984985f0
parent: 8abc0d4a1181b44e0a42cadab4a15f8c6aa42451
Commit Summary:
Diffstat:
1 file changed, 6 insertions, 0 deletions
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index dc0437e84763..9897f38af707 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -1266,6 +1266,12 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
/* Symlink's inode data is the target path. Read it and
* keep in RAM to facilitate quick follow symlink
* operation. */
+ uint32_t csize = je32_to_cpu(latest_node->csize);
+ if (csize > JFFS2_MAX_NAME_LEN) {
+ mutex_unlock(&f->sem);
+ jffs2_do_clear_inode(c, f);
+ return -ENAMETOOLONG;
+ }
f->target = kmalloc(je32_to_cpu(latest_node->csize) + 1, GFP_KERNEL);
if (!f->target) {
JFFS2_ERROR("can't allocate %d bytes of memory for the symlink target path cache\n", je32_to_cpu(latest_node->csize));